For a bank of three single-phase, two-winding, transformers whose high-voltage terminals are connected to a three-phase, 13.8 kV feeder (line-line), and the low-voltage terminals connected to a three-phase substation load rated 2.1 MVA and 2.3 kV, determine the required voltage, current, and MVA ratings of both windings of each transformer, when the high-voltage/low-voltage windings are connected:

The softest and hardest minerals are: softest hardest

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block